ONAN 3384577 HEATER HARNESS Original ONAN/CUMMINS OEM part
ONAN
- Payment Methods
-
- SKU:
- ONAN 338-4577
- MPN:
- 338-4577
- Condition:
- New
- Shipping:
- $35.00 (Fixed Shipping Cost)

Available Inventory
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Competitive Pricing
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Customer Support
Our team is always ready to answer your questions and provide the best assistance.
Description
- Built to ensure consistent engine warmth and protect your generator’s vital systems
- Crafted with precision to maintain peak electrical connectivity and resilience
- Original Equipment Manufacturer (OEM) part guarantees perfect fit and long-term reliability
ONAN 338-4577 HEATER HARNESS – Powering Every Spark of Dependability
Designed to safeguard engine components against cold starts and extend your generator’s lifespan, the ONAN 338-4577 Heater Harness delivers unmatched OEM quality for steadfast performance. Trust in genuine parts to preserve your system’s integrity and never miss a moment of reliable power. Take action now and secure your Onan generator’s future with this essential harness—because consistent power matters.
Feature that Ignites Confidence
- Ensures reliable heater circuit function to prevent engine damage during low temperatures
- Timely replacement avoids costly downtime and maintains generator efficiency
- Order this OEM genuine part today to reinforce your equipment’s durability and safety
Details
Product SKU: ONAN 338-4577
Our knowledgeable team is always ready to guide you in choosing the perfect replacement for your needs. Reach out through our Help Center for expert advice and support. We are dedicated to helping you achieve the best repair outcome and a seamless generator performance experience.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov